Double walled tumbler



FIG. 1 is a top right isometric view of a double walled tumbler showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a top left perspective view.

The broken lines in the drawings depict portions of the double walled tumbler that form no part of the claimed design. 

CLAIM The ornamental design for a double walled tumbler, as shown and described. 